Type-writing machine.



A. T. BROWN. TYPE WRITING MACHINE.

APPLIOATION FILED JUNE 29, 1904 Patented 001;. 5, 1909.

5 SHEETS-SHEET l.

A. T.'BROWN.

TYPE WRITING MAHINE. APPLICATION FILED-JUNE 29, 1904.

Patented Oct. 5, 1909.

5 SHEETS-SHEET 2.

A. T. BROWN.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE 29. 1904.

935,776. Patented o@t.5,19o9.

5 SEEETS-SHEET 3.

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A. T. BRWN.

TYPE WRITING MACHINE.

APPLIUATION FILED JUNE ze. 1904.

935,776; Patented 0011.5, 1909.

5 SHEETS-SHEET 4.

A. T. BROWN TYPE WRITING MACHINE.

APPLIOATION FILED JUNE 29, 1904,

Patented Oct. 5, 1909.

5 SHEBTS-SHEET 5.

UNITED STATES PATENT OFFICE.

ALEXANDER 'I'. BROWN, OF SYRACUSE, NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Oct. 5, 1909.

Application filed .Tune 29, 1904. Serial No. 214,625.

lVriting Machines, of which the followingv is a specification.

My invention relates to typewriting machines and it consists in certainfeatures of construction and combinations of parts which will hc fullyset forth herein and particularly pointed out in the claims.

One embodiment of my invention is illustrated in the accompanyingdrawings, in which- Figure 1 is a longitudinal sectional view of atypewrit-ing machine; Fig. Q is a sectional view through theepicycloidal train of the escapement mechanism; Fig. 3 is a rearelevation of the machine; Fig. l is an end elevation; Figs. 5 and 6 aredetail views of the line space mechanism as seen from the righthand endofthe machine; Fig. 7 is a detail view showing a portion of the carriagefeed mechanism as seen from the rear, including a device for feeding thecarriage toward the right; Fig. 3 is a detail view of 'the hackspacingmechanism; Figs. 9, 10, 11 and 12 are detail views of the escapementmechanism; Figs. 13 to Q0 are detail views of the carriage returningmechanism; and Fig. 21 is a` perspective view of a har which is mountedon 'the carriage. y

l have illustrated my invention as applied to a front-strike typewriter,hutmany of the features thereof are also applicable to other sorts oftypewriters.

The hase portion of the main frame of the machine, here illustratedcomprises side plates 1, a back plate 2, a shelf 3 and a transversepartition i. Posts 5 rising from the said hase portion supporta topplate 6 upon which the carriage is mounted. The lkeys T have their stemslpivoted to-arms 8 projecting from rock shafts 9, which are journaled attheir forward ends in frame plates 10 and Aat their rear ends .in the,partition l. Each of said rock shafts carries an arm 11, which isconnected by a link 12 to one arm 13 of a Vthree armed sub-lever,another arm 11 of which is connected hy a link 15 to a ltype har 16which carries at its outer end two types 17 and 1S. The sub-levers arepivoted in hangers 19 which are secured hy screws 20 Ato a finedAsegment Q1 which is rigidly mounted in the main frame. The type hars 1Gare ournalcd by ball hearings on a segment Q2, which is supported byarms 23 for an up and down case shiftmotion.

The mechanism thus far described is not claimed herein, as suchmechanism forms the subjectanatter of other applications of minecopending herewith.

The carriage is mounted on, and is supported solely by, a single railwhich liesl flat on the top plate GA and has race-ways 2: and 26 formedin its front and rear edges respectively. The rail 24 is secured to thetop plate by two screws 27 (Fig. 3) having milled heads 28. Said screwspass through the top plate 6 and are threaded into the rail 24. Theconstruction is suoli that the rail and the carriage mounted thereon mayhe readily removed from the machine by loosening the screws 27, andanother carriage and rail of different length may he substituted for it.The carriage truck comprises two end pieces 29 which are rigidlyconnected together by a rail or frame-piece 30 and a frame rod 31. Therail 30 is rigidly fastened to the end pieces 29 and is formed, as shownin Fig. 1, to cover up the forward half of the rail 24. The rail 30 hasa raceway formed therein which cooperates with the race-way 25 and inthese cooperating race-ways run anti-friction halls or rollers 32. Asecond rail 33 covers the rear half of the rail 24 and has formedtherein a raceway which coperaties with the race-way 26. f

The rail 33 is adjustahly secured to the end pieces 29 hy headed screws3l which pass through slots in the rail 33 and are threaded into the endpieces 29. As shown in F igs. 3 and 4, screws 35 are threaded throughdepending portions of the end pieces 2S) and engage the rear side of therail 33. The hall bearings for the carriage may he adjusted by means ofthese screws. The two rails 30 and 3.3, substantially cover up the rail9.4, and shield the ball hearing from dirt. The end pieces 29 of thecarriage truck extend forward and upward from the rail 30 and have theVvplaten 36 :journaled therein in the usual manner. It will he seen hyan inspection of Fig. 1 4that the center of gravity of the carriage isforward ofthe forward set of rollers or halls .32; so that the weight ofthe carriage is sustained `hy downward pressure on said forward set ofhalls and by upward pressure on the rear setof halls. That is to say,the race part of the carriage comprises a downwardly facing bearing Land the opposing or stationary race part comprises an upwardly facingbearing b, these bearings being at the front, and the race part on thecarriage also comprises at the rear an upwardly facing bearing c andsaid opposing race part at the rear comprises a downwardly facingbearing cl; and the weight of the carriage causes a downward pressure onthe parts a and I) and the upward pressure on the parts c and (Z.Moreover, the carriage bearings are selfadjusting for wear.

A rack bar 37 is secured to the underside of the carriage rail 30 andsaid rack bar is in mesh with two gear wheels 3S and 39 which areloosely mounted side by side on a shaft 40 and extend through slotsformed for the purpose in the top plate 6 and rail 24. As shown in Fig.7 the gear wheel .39 has one tooth 39 of peculiar form to serve as aguide in placing a new carriage on the machine. This tooth may be madedifferent from the other teeth in any suitable manner, but as here shownthe peculiarity consists in making this one tooth of double width and acorresponding interdental space is of course made in the carriage rack.The purpose is to place a carriage on the machine always in suchposition that this peculiar tooth will mesh with the correspondinginterdental space on the carriage rack. The gear wheel 39 has fixed toone face thereof a spring drum 41 in which is coiled a spring 42, theouter end of which is secured to said spring drum and the inner end ofwhich is secured to the shaft 40, on which the spring drum 41 isjournaled. The shaft 40 is journaled in two vertical frame pieces 43 and44, which are rigidly mounted on the shelf 3, to which they are securedby screws 45 (Fig. threaded into lugs rising from said shelf. Thetension of the spring 42 may be regulated by means of a ratchet wheel 46which is controlled in the usual manner by a pawl 47 pivoted on theframe piece 43. 1t will be perceived that the carriage is driven by thespring 42 acting through the gear wheel 39. The step by step feed of thecarriage'is controlled by an escapement mechanism which is geared to thegear wheel 3S. rlhe gear wheel 3S is loosely mounted on the hub of thegear wheel 39, but the freedom of motion of one of these wheelsrelatively to the other is limited by a screw or pin 48 (Fig. 8) whichis secured to one of said gear wheels and projects into an opening 49 inthe other, said opening being' of greater diameter than the screw orpin, so as to admit of enough play to take up any lost motion that mayexist between the teeth of said gear wheels and the teeth of the rackbar 37. lVhen the carriage is removed from the machine, this connectionbetween the two wheels prevents relative rotation of such wheels, sothat the main spring is controlled bythe escapement mechanism, whetherthe carriage is in position on the machine or not. The gear wheel 3Smeshes with a pinion 50 wiich is fixed on a shaft 51 (Fig. 7) on whichis rigidly mounted a squared block 52 (Figs. 1 and 2). Two beveled gears53 and 54 are journaled on shouldered screws 55 which are threaded intothe block 52. These beveled gears mesh with beveled gears 56 and 57which are journaled on the shaft 51, the whole constituting a bevel-Gearepicycloidal train. An escapement wheel 58 is rigidly mounted on the hubof the bevel-gear 56, and a gear wheel 59 is-rigidly mounted on the hubof the bevel-gear 57. As best shown in Fig. 7, the gear wheel 59 mesheswith a pinion (30 which is fixed on a shaft 61 which is journaled in theframe plates 43 and 44. Said shaft 61 extends through the frame piece 44and has fixed on the end thereof in front of said frame piece atwo-toothed escapement wheel 62. The construction is such that the shaft51 is controlled by both of the escapement wheels 58 and 62, and saidshaft is free to turn when either of said escapement wheels is released,and if both of said escapement wheels be released at the same time theshaft is free to turn through a distance equal to the sum of thedistances permitted by the two escapements separately. 1n the presentinstance the shaft 61 is geared to move through three times the angulardistance of the gear wheel 59, and the ratchet wheel 62 has two teethwhile the ratchet wheel 58 has six teeth. This being the case, it willbe perceived that the two escapement wheels are designed to afford thesame extent of feed movement to the carriage.

The escapement wheel 62 is controlled by feed dogs which are connectedwith the universal bar so that said escapement wheel is under thecontrol of the character keys. The escapement wheel 5S is controlled byfeed dogs which are operated by the space key, so that when the lastletter of a word is printed the key corresponding to such letter and thespace key may be struck at the same time with the result that thecarriage will be fed a double distance to space between words. ln Fig. 1the shaft'l is shown broken away a short distance behind the frame piece44 in order to show the mechanism mounted on the shaft 51.

The escapement wheel 58 is controlled by two feed dogs 63 and G4, bothof which are pivoted on a rod 65 supported by the frame pieces 43 and4-4. The feed dog 63 is formed on, or consists of, one arm of a bellcrank lever, the other arm 66 of which is connected by a link 67 to anarm 68 projecting from a rock shaft 69 which is ournaled at its rear endin the back plate 2 and at its front end in one of the frame plates 10and which is operated by a space key 70, the stem of which is pivoted toan arm 71 projecting from said rock shaft. lThe dog 63 is normally outof the path otl the tooth of the esfapement wheel 58, as shown in Fig.3. The dog (ist extends substantiallyl horizontal-ly from the rod G5 andnormally lies in engagement with one of the teeth of the escapeineiitwheel. This dog has an adjusting screw 72 threaded through it, and thelower end of said screw is in position to be engaged by an arm 7 3integral with the dog The construction is sncli that when the space keyis depressed the dog G3 is thrown into the path of a tooth of theescapement wheel and the dog Get is lifted out of the path of the teethof said wheel by the arm 7 5 engaging the screw 72. The amount of motionthus imparted to the dog Gl may be regulated by adjusting the screw 72.Then the key 70 is released the parts are returned to normal position,withdrawing the dog (33 and permitting the dog 6l to dropv into the pathof the next succeeding tooth of the escapeinent wheel, by a spring Tf-t(Fig. 1) coiled about the shaft 69 and connected at one end to the frameplate 10 and at the other end to the arm 71.

Each of the sub-levers 13, 1st has a rearwardly extending arm 7 5 towhich is connected one end of a spring 76, the other end of which isconnected to the washer 77 of the screw 20 by which the hanger 19 issecured to the segment 21. The arms 7 operate the universal bar 7 3.Said universal bai' has the forni of a stepped segment and it is mountedfor parallel motion up and down. To this end two brackets 79 are securedto the front :taceof the universal bar (Fig. 1) near the ends thereofand each of said brackets has pivoted thereto at 30, an arm 81 which isrigidly connected to a rock shaft S2, which is journaled in brackets 83of the top plate (3. A bracket or arm Se is fixed to the universal barnear the middle thereof and said bracket is pivotally connected at S5 toa link Sti which is pivoted at 87 to a bracket SS 21. The link SG is ofthe same length as the arms 31 and parallel to said arms, so that saidarms and link guide the universal bar for parallel motion. All of thesub-levers 13, 14 are mounted to swing in substantially vertical planes,and the universal bar is stepped on its under side, as shown in Fig. 3,and each of the arms cooperates with one of the steps. ln order to makethe universal bar light and to avoid noise, I prefer to construct thatpart of said universal bar which is engaged by the arms 7 5 of wood orother organic material, and said universal bar is accordingly built upof two thin segmental plates 39 having a layer of wood or similarmaterial interposed between them, the whole being connected together byrivets 90 (Fig. The organic material projects beyond the metallic platesand has the steps formed therein, as clearly shown in Fig. 3. Theescapement wheel 62 has its teeth projecting from its front facesubstantially parallel to its axis of rotation, as shown in Fig. 1. Themiddle portion of the universal bai' lies directly in front of thisescapement wheel and the feed dogs 91 and 92 are mounted directly onsaid universal bar, as best shown in F igs. 1 and 9. wWhile any suitablefeed dogs might be employed, yet l prefer to use the constructionillustrated in the drawings, in which the fixed dog 91 consists of anear bent up from a piece of sheet metal 93, which is secured, as byrivets 9-1, to the rear face of the universal bar. The loose dog 92 ispivoted on a screw 95 which is threaded into an ear of the plate 93.Said screw stands approximately over the shaft G1, so that when theuniversal bar is reciprocated the pivot of the loose dog moves in adirection substantially toward and from the particular tooth of theescapement wheel with which the feed dogs are cooperating at the time.In the normal position of the parts shown in Fig. 9, the loose dog 92 isengaged by a tooth of the ratchet wheel, which presses it against a stop9G, which stop consists of an ear bent up from the plate 93.

The dog 92 extends a short distance above its pivot where it isconnected to one end of a. light spring 97, the other end ot which isconnected to an ear 98 bent up from the plate 93. lVhen the universalbar and the feed dogs are raised by the depression of a key to theirupper position, the spring 97 moves the loose dog 92 to the positionshown in said Fig. 10, against a stop 99, which consists of an ear bentup from the plate 93. Tl-ien the key is released the tooth of theeseapement wheel escapes past the lixed dog 91 and the next toothengages the loose dog The escapement wheel 62 being so jgeared to thecarriage that a single letter space movement of said carriage turns saidescapement wheel through half of a comwhich is rigidly secured to thefixed segment plete rotation, the pressure of the tooth of theescapeineiit wheel against the feed dogs is very light and consequentlyotllers a very slight frictional resistance to the movement of the feeddogs, thus lesseiiing the work thrown on the character keys by theescapement. The escapeinent wheel 53 is not geared up in this way, asthe space key has no other work to do than that of operating saidescapeinent, and a light touch on said key is therefore comparativelyunimportant.

1 have provided a back spacing device for imparting to the carriage astep-by-step movement toward the right. This device comprises a rockshaft 100 (Fig. 3), which is mounted in the framework and is operated bya back spacing key in the saine manner as the rock shaft G9 by the spacekey. rlhe shaft 100 has an arm 101 rigidly secured thereto, and said armis connected by a link 102 with an arm 103, which .is mounted on7 a rodor shaft 104, which is mounted in the frame plates 43 and 44. ris bestshown in F 7 and 8, the arm 103 forms part of a rock .frame on which apawl 105 is pivoted at 106. YVhen the parts are in their normal positionshown in Fig. 7, the pawl 105 is pressed into engagement with a stop pin107 projecting from the rock frame, by a spring 108, which is connectedat one end to said pawl and at the other end to the arm 103. When thearm 103 is drawn down by the depression of the back-spacing key, thestop 107 is moved away from the pawl 105 which drops into engagementwith one of the teeth of the gear wheel 38 and moves said gear wheelbackward. The pawl 105 has a tail 109, which, at the end of the strokeof the pawl enters the space between two of the teeth of the gear wheeland stops the motion of all of the parts, thus positively preventing anyoveriow of the wheel. When the carriage is moved toward the right eitherby the back-spacing mechanism just described or by hand, the escapementwheel 58 turns in a direction the reverse of that in which it turns inthe ordinary operation of the machine, and the loose dog 64 acts as apawl or detent and the wheel 58 as a ratchet wheel. In order to preventthe escapement wheel 62 from turning when the back spacing mechanism isoperated, the shaft 61 on which said eseapement wheel is mounted hasfixed thereon, just behind the frame plate 44, a two toothed ratchetwheel 110 (Figs. 9 and 11), and a pawl or detent 111 pivoted to theframe plate 44 at 112, is pressed into engagement with said ratchetwheel by a spring 113 which is connected at one end to the pawl and atthe other end to the frame piece. If the escapement wheel 62 were freeto turn backward when the back space mechanism is operated, both of theescapement wheels might turn backward and the motion of the gear 38might thus be divided between the two .esca pement wheels, in which casethe escapementiwheel 58 might not turn far enough for the next tooththereof to be caught by the dog 64.

For the purpose of moving the carriage toward the right, as, forexample, to begin a new line, I provide a carriage returning handle 114.Said handle is formed on the end of a lever 115 which is fixed on theend of a rock shaft 116, which is journaled in the main frame. The shaft116 is jonrnaled in an elongated bearing 117 (Fig. 3) and has fixedthereto at its inner end a segmental gear 118 which meshes with a pinion119, which is mounted on a shaft 120 which is journaled at one end in anear or bracket 121 (Fig. 4) projecting from one of the posts 5 and atits other end in the frame piece 44. Near its inner end the shaft 120has fixed thereto a bevel-gear 121 (Fig. 3)

which meshes with a bevel-gear 122, which is journaled on the shaft 40.The hub of the bevel-gear 121 passes loosely through the gear wheel 38,and has the gear wheel 39 rigidly mounted thereon. The construction issuch that if the handle 114 be depressed, the shaft 120 and the gearwheel 39 will be turned and the carriage be moved toward the right.

I provide a line space device which is 0perated by the handle 114 whensaid handle is used to return the carriage and which is automaticallydisconnected from said handle and returned to normal position when thehandle is released. To this end the pinion 119 is not fixed on the shaft120 but has a hub which is loosely mounted on said shaft and from whichprojects an arm 123, to the upper end of which is pivoted a pawl 124,the free end of which has a laterally projecting tooth 125 (Fig. 3)which lies over the periphery of a ratchet wheel 126, wnich is rigidlymounted on one end of a sleeve 127, which is loosely mounted on theshaft 120. An arm 128 (Fig. 20) lies between the arm 123 and the ratchetwheel 126 and is mounted on the shaft 120 to which it is rigidly securedby a pin 129 passing through said shaft and through the hub of said arm.As shown in Fig. 20, the arm 128 is notched at its end, and into thisnotch projects a tooth 130 which depends from the pawl 124. The

construction is such that when the handle 114 is depressed the pinion119 and the arm 123 connected thereto are turned toward the back of themachine and the pawl 124 is depresssed into engagement with the ratchetwheel 126, as shown by full lines in Fig. 20, by the engagement of thetooth 130 with the all of the notch in the end of the arm 128, thepinion 119 turning slightly on the shaft 120 in this operation. As soonas the pawl engages the ratchet wheel, said wheel is turned with thepinion by the pawl, and the shaft is turned with the pinion by the tooth130. lVhen the handle 114 is released it is slightly raised by a spring131 (Fig. 4), which is connected at one end to a pin 132 projecting fromone of the side pieces 1, and at the other end with the segment 118."When the segment is moved by the spring 131 the pinion and the arm 123are turned toward the front of the machine and the pawl 124 is liftedinto the position shown by dotted lines in Fig. 20, out of engagementwith the ratchet wheel 126, by the tooth 130 pressing against one of thewalls of the notch in the end of the arm 128. Any suitable means may beprovided for limiting the motion of the pawl 124 in this operation. Itwill be perceived that there is between the shaft 120 and the pinion 119suflicient lost motion to throw the pawl 124 into and out of engagementwith the ratchet wheel 126. The sleeve 127 has a flange 133 (Fig. 3) toseam which is rigidly secured a cam disk 134. the outline of which isshown in Figs. and 15-19, the disk being shown in normal position inFig. 15,. The disk 13,4 has the form of arcircle concentric with theshaft 120, except that it is cut away on one side to form a sort ofnotch, one side of which constitutes a cam. Then the disk is turned,this cam operates a follower consisting of an anti-friction roller 136which normally rests in Ithe bottom of the notch, as shown in F 15. rTheanti-friction roller 136, is journaled on a stud 137 projecting from anarm 13S which is fixed on one end of a rock shaft 13S), which isjournaled in a bracket 140 (Fig. 3), which projects from the frame piece44. To the other end of the rock shaft 139 is fixed an arm 141 whichextends toward the back of the machine and which has pivoted to its freeend a rod 142 which passes loosely through an opening in the top plate 6and has journaled on its upper end an antifriction roller or wheel 143.rlhe construction is such that when the cam disk 1,34 is turned by theratchet wheel 126 the arm 138 is depressed, as shown in Fig. 16 and thearm 141, rod 142 and roller 143 are elevated. The roller 143 operates ayoke frame which is mounted on the carriage and which will behereinafter described. )When the pawl 124 is lifted off of the ratchet126 by the action of the spring 131 the ratchetwheel 126, the sleeve 127and the cam disk 134 are returned to normal position by a coiled spring144 (F 3), which is connected at its inner end to the sleeve 127 and atits outer end at 145 to the top plate 6 `or to any other suitablestationary7 part.

As has been stated hereinbefore, the carriage of this machine is readilydetachable and it is contemplated that interchangeable carriages ofdifferent lengths may be used on the machine. )When a long carriage isused it may require a complete rotation of the shaft 120 or even morethan a complete rotation of the said shaft, to return the carriage toits right-hand position; and I have provided means for preventing thefollower 136 from dropping back into the notch in the disk 134 underthese conditions. If said follower were permitted to drop back into saidnotch in this way, the arm 138 would be operated twice at a singleoperation of the handle 114 and the line space mechanism would also beoperated twice. To prevent this, a disk 146 (Figs. 3, 14, 16 and 17) isloosely mounted on the shaft 120 by the side of the disk 134. The disk146 is held against displacement toward the. left (as viewed from thefront of the machine) by a collar 146, (Fig. 3) mounted on the shaft120. The disk 146 has substantially the same peripheral outline as thedisk 134 and when'the parts are in normal position, as shown in Fig. 15,the notches 4of the two disks register with each other and the follower136 rests in both notches. The disk 146 is formed with a segmental slot-147 (Fig. 14) into which projects an ear 14S bent out from the face ofthe disk 134. Vhen the parts stand in their normal position, shown inFig. 15, the ear 143 is in engagement with one end wall of the segmentalslot 147. pressed the disk 134 is turned in the direction ofthe arrow inFig. 15, the disk 146 remaining stationary and the ear 14S moving idlyin the segmental slot 147 until the position shown in Fig. 16 isreached, when the ear 14S engages the other end wall of the slot 147 andcarries the disk 146 along with it. The parts are then in such positionthat the notch in the disk 134 is masked by the circular periphery ofthe disk 146, so that if the two disks move on to such position thatsaid notch passes over the follower 136, said follower will be held inits operated position by the disk 146. The two disks may thus movetogether to an extreme position, such, for example, as that shown inFig. 17, without permitting the follower to drop into the notch. )Whenthe handle is released and the pawl 124 lifted out of engagement withthe ratchet wheel 126, the spring 144 moves the disk 134 in thedirection of the arrow in Fig. 17, the disk 146 remaining stationaryuntil the disk 134 reaches the position shown in Fig. 18, when the ear14S encounters the end wall of the slot 147. In this position thenotches in the two disks are again in register. After this the two disksreturn to normal position together and the follower again drops into thenotch. ln order to arrest the disks in their normal position, an ear 149is bent outward from the face of the disk 146 and projects into the pathof a pin 150 3 and 15,) which projects from lthe side of a bracket 151which depends from the top plate 6, to which it is secured by a screw152.

It will be perceived that except for the slight lost motion between thepinion 119 and the shaft 120, the handle 114 always moves in unison withthe carriage, but that when said handle is released the disks 134 and146 and the parts connected therewith and controlled thereby return tonormal position immediately.

As shown in Figs. 4 and 6, the roller 143 engages the underside of aflange 153 of a yoke bar 154 which at its ends is rigidly )Vhen thehandle 114 is de mounted on arms 155 and 156 (Figs. 6 and A 21), saidarms being pivoted to the end pieces 29 of the carriage truck. The arms155 and 156 normally lie in a substantially horizontal position, the bar154 being mounted on the rear free ends of said arms and extendingnearly from one end piece 29 to the other. The bar 154 is grooved alongits rear edge, the flange 153 forming the lower side of the groove.Except for the flange 153, the bar is nearly triangular 1n crosssection, andv it has two stop pieces 157 and 158 slidably mountedthereon, dove-tail fashion. Each of the stop pieces is slotted and inthis slotis pivoted a latch 159 (Fig. 21) which is pressed by a spring160 into such position that the lower edge of said latch normally restsin one of a series of notches or transverse grooves 161 which are formeda letter space distance apart in the upper surface of t-he bar. The barmay be graduated on this upper surface to guide the operator inadjusting the stop pieces. The stop piece 157 has a lug 162 projectingfrom its rear edge and formed with oblique faces which actuate an alarmmechanism which is not shown herein'. The stop piece 158 has a lug ormargin stop 163 projecting from its rear edge, and said margin stop isformed with one abrupt face 164 and one oblique or cam face 165. Thenthe bar 154 is in its normal position, the stop 163 is in position toengage a coperating stop which consists of a lug 166 projecting from thefront face of an arm 167 which is hinged on a rod 168 which is supportedin ears 169 projecting from the main frame. The arm 167 may be pressedback out of the path of the stop 163 but it is normally held in itsforward position by a spring 17 O which is coiled about the rod 168 andpresses at one end against the framework and at the other end againstthe arm. The forward motion of the arm 167 under the impulse of thespring 170 is limited by a stop or lug 171 (Fig. 4) projecting from theframework. The arm 167 at its upper end is bent toward the front of themachine, so that when the bar 154 is raised by the roller 143, as shownin Fig. 6, the stop 163 is in position to engage and to be arrested bysaid upper end of the arm; butwhen the bar 154 occupies the intermediateposition shown in Fig. 5, the stop 163 is in an inoperative positionwhere it will not be arrested either by the lug 166 or the upper end ofthe arm 167.

The arm 155, which supports one end of the bar 154, has integraltherewith an upwardly and forwardly extending arm 172 to which the linespace pawl 173 is pivoted at 174. The platen 36 has a shaft 175 which isjournaled in the end pieces 29 of the truck and has finger wheels 176secured upon its ends in the usual manner. A line space ratchet wheel177 is fixed on the shaft 175 or is secured to one end of the platen 36,as usual, and the free end of the pawl 173 is pressed toward thisratchet wheel by a spring 178 which is fixed to the arm 172 and pressesagainst the heel 179 of the pawl. As the pawl 17 3 is moved through thesame distance at every operation of the returning mechanism, l haveprovided an adjustable shield 180 to regulate the extent of rotationimparted to the platen at each actuation of said pawl. The shield 180 ispivoted on the shaft 175 and is free to be rockedabout said shaft to anextent which is limited by shoulders 181 which are adapted to engage aportion of the' end piece 29. A handle 182 is secured to the shield 180.The shield 180 is yieldingly held in any one of several positions towhich it may be adjusted, by a spring pressed pin 183 (Figs. 3 and 4)which is seated in a shouldered opening in the end piece 29 and theconical inner end of which engages in a series of holes or depressions184 in the shield 180. In the present instance I have shown four suchdepressions, three of them corresponding to triple, double and singlespacing respectively and the fourth to a position of the shield in whichthe pawl 173 makes its entire excursion without operating the ratchetwheel 17 7 at all. The shield 180 is shown in Fig. 4 set for double'spacing. The pawl 173 normally rests on the periphery of the shield,even when said shield is set for triple spacing, so that, even in thisposition of the parts, there is enough lost motion between the pawl 173and the first tooth of the ratchet wheel 177 beyond the end of theshield to permit of the bar 154 being moved to the position shown inFig. 5 without operating the ratchet wheel. lThe purpose of thisarrangement will appear hereinafter. The arm 172 has a portion thereofprolonged beyond the pivot 174 to form atooth 185 which, when the arm172 has reached the extreme end of its travel, engages one of the teethof the ratchet wheel and positively arrests said ratchet wheel toprevent overthrow. This position of the parts is shown in Fig. 6. Adetent roller 1.77, is mounted on a spring arm or bracket 177, andengages the ratchet wheel 177 in the usual manner.

The bar 154 is moved to the position shown in Fig. 5 where the stop 163is inoperative, by a carriage release key 186 formed on the end of alever 187 which is pivoted at 188 to the left-hand end plate 2,9. Thislever has a rearwardly extending arm which lies beneathan arm 189 (Fig.21) projecting from the bar 154 beyond the end thereof. As shown in Fig.1, the lever 187 has back of its pivot an ear 190 which is bent over thetop of the end piece 29, and a spring 191 fixed to said end piece,engages said ear and presses the lever to normal position. The lever 187has an elongated slot 192 through which passes the shaft 175 of theplaten 36, and the motion of the lever in both directions is limited bythe engagement ef the ends of said slot with said shaft. I have providedmeans for releasing the carriage from the escapement mechanism when thekey 186 is depressed. A vertically disposed bar 193 is loosely mountedin slots in the top plate G and the shelf 3 so as to be free to slide upand down. This bar is formed with a U-sha pcd upper end 191- whichloosely engages the flange 153 of the bar 154, as shown in Fig. 1, sothat said flange is free to slide transversely of the machine, but whenit is raised or lowered the bar 198 moves up and down in unison with it.rl`his bar has a dog or trip 195 piyoted to one side thereof on ashouldered screw 196, and the end of said dog rests beneath an arm 197of the escapem'ent dog (54e. T he arm 197 projects through an openingmade for the purpose in the fra-me plate 18 into the path of the trip195. Said trip is extended below its pivot and plays in the slot in theshelf S and is guided by one end of said slot. The edge of the dependingportion of the trip has an oblique portion 1.6 which is below the shelf3 when the parts are in their normal position shown by full lines inFig. 1Q. TWhen the bar 15st is raised by the release key to the positionshown in Fig. 5, the trip 195 raises the dog (-jl out of engagement withthe ratchet wheel 5S into the position shown by dotted lines in Fig. 19,but. when a greater extent of motion is imparted to the bar 151 by thecarriage returning device, the oblique edge 19S of the trip 195 camssaid trip over until its upper end mores away from the arm 197 and thedog Get is thus released and is permitted to fall again into engagementwith the ratchet wheel, so that when the carriage returning handlereleased the dog is in position to hold the carriage in the position towhich it has been moved. `When said handle is so released, the bar 193falls back to its normal position and the trip 195 again snaps under thearm 19T. ,Vhen the dog is lifted ot of the ratchet wheel by the releasekey, said ratchet wheel is, of course` free to turn to any extent ineither direction and the carriage is therefore free to be moved by handto any extent in either direction. rllhe lostmotion between the linespace pawl and ratchet wheel is such that said ratchet wheel is notvoperated by the release key.

rlwo brackets 199 (Figs. 3 and si) are rigidly mounted on the rail piece30 of the carriage. and each of said brackets has a socket 200 forsupporting a paper table in a well known manner. To each of thesebrackets an arm 201 is piyoted at 209, and these arms extend toward theplaten and hare ournaled therein a pressure roller 203 (Fig. t). Saidarms are pressed upward to press said roller against the platen bysprings s- (Fig. secured to the rail 30 and engaging the under sides ofsaid arms. The arms 201 hare spring` extensions 205 which extend towardthe front of the ma-' chine and are connected by a scale plate 206; andeach of said arms has a pressure roller 20T journaled in ears thereofand pressed against the platen by the resilience of the arms. A shaft208 is journaled in the brackets 199 and has tiattened portions Q09which lie just above the arms 201. The shaft 208 is extended toward theleft-hand end of the carriage and is journaled at its end in theleft-hand frame piece 29. Near this end thereof, the shaft has securedthereto an arm 210 haring at the upper free end thereof a handle 211 bywhich the shaft may be rocked. Then this handle is drawn toward thefront of the machine the arms C201 are depressed and the handle may beturned so far forward that said arms rest against the cylindrical partof the shaft. As the pressure of the arms against the shaft in thisposition has no tendency to turn the shaft, the parts are practicallylocked in that position with the rollers 203 and Q07 depressed out ofengagement with the platen.

The carriage feed mechanism set forth herein is not claimed in thisapplication, but is claimed in my appli ation Serial Xo. 929,485, tiledOct. 21, 1904, which is a division of the present. application. r1`heball bearing type bar and the connections between said type bar and thekeys are claimed in my pending application, Serial No. 201,260, and Apr.2,1904.

TWhat I claim as new and desire to secure by Letters Patent, is im l. Ina typewriting machine, the combination with the main frame, of a raildetachably mounted thereon and haring two raceways in theA front andrear edges thereof respectively; a carriage having end pieces connectedtogether by a strip which covers one of the race-ways of the rail andhas a raceway which eoperates with said race-way in the rail; andanother strip which corel-s the other of the race-ways in the rail andhas a race-way coperating therewith, the latter strip being adjustablymounted on the carriage.

Q. In a typewriting machine, the combination of a carriage; step-by-stepfeed devices for said carriage; a platen mounted on said carriage; ahandle for returning said carriage; means operated by said handle forimparting a line space motion to said platen, said means beingautomatically connected with said handle when the latter is operated anddisconnected therefrom when the handle is released, and means forrestoring the, line spacing means to normal position independently ofthe handle moyement after such disconnection.

3. In a typewriting machine, the combination with the main frame, of arail mounted on said main frame and having two oppositely disposedrace-ways; a carriage haring' two race-ways which cooperate with therace-ways of the rail, and one of which is rigidly and the other ofwhich is adjustably connected thereto; anti-friction rollers in saidrace-ways;A a rack bar mounted on said carriage between said carriageraceways; a gear wheel meshing with said rack bar; and an escapementmechanism for controlling said gear wheel.

4. In a typewriting machine, the combination with the carriage and theplaten, of a handle; means operated by said handle for returning thecarriage; a line space device; means for automatically connecting saidline space device with the handle when the latter is operated and meansfor automatically restoring said line space device to normal positionindependentlyT of the movement of the handle back to its initialposition.

5. In a typewriting machine, the combination with the carriage and theplaten, of a handle; means operated by said handle for returning thecarriage; a cam iiiiich is operated by said handle when the latter isused to return the carriage; a line space device operated by said cam;and means for restoringsaid cam to normal position when said handle isreleased.

(3. In a typewriting machine, the combination with the carriage and theplaten, of a handle which moves in unison with the carriage in bothdirections; means operated by said handle for returning the carriage; aline space device; means whereby said line space device is automaticallyconnected with said handle when the latter is operated to restore thecarriage; and means for restoring said line space device to normalposition independently of the movement of the handle back to initialposition.

7. In a typewriting machine, the combination with the carriage, of astop mounted on said carriage; a cooperating stop mounted on the mainframe; a handle; means operated by said handle for moving one of saidstops into the path of the other and a second means operated by thehandle and cooperating with the first means for returning the carriage.

8^. In a typewriting machine, the combination with the carriage, of astop mounted thereon; a cooperating stop mounted on the main frame; aplaten; a handle; means operated by said handle for moving one of saidstops into the path of the other and a second means operated by thehandle and cooperating with the first means for imparting a line spacemovement to said platen.

9. In a typewriting machine, the combination with the carriage andplaten, of a stop mounted on said carriage; a coperating stop mounted onthe main frame; a handle; and connections whereby said hanvdle moves oneof said stops into the path of the other, imparts a line movementto theplaten and restores the carriage.

lO. In a typewi'iting machine, the combi--v nation with the carriage, ofa carriage restoring lever; connections between said lever and saidcarriage including a shaft geared to said carriage, a pinion on saidshaft, and ak segmental gear connected with said lever and meshing withsaid pinion; and means extending to and operated by the connectionsbetween said lever and said carriage for imparting a line-space feed tosaid platen.

ll. In a typewriting machine, the combination with the carriage andplaten, of a carriage returning handle geared to said carriage; a cam; aline space device operated by said cain; and means whereby said cam ismoved in one direction by said handle.

1Q. In a typewriting machine, the combination with the carriage and theplaten, of a shaft geared to said carriage; a cam loosely mounted onsaid shaft; a ratchet connected to said cam; a pawl mounted on saidshaft and normally disengaged from said ratchet; an operating handle;means for throwing said pawl into engagement with said ratchet when saidhandle is operated; line space mechanism operated by said cam; and meansfor returning said cam to normal position.

13. In a typewriting machine, the combination with the carriage andplaten, of a shaft geared to said carriage; a ratchet loosely mounted onsaid shaft; an arm fixed to said shaft; an arm loosely mounted on saidshaft and having a pawl pivoted thereto and engaging said fixed arm insuch manner that when said loose arm is moved in one direction said pawlis pressed into engagement with said ratchet; a handle for moving saidloose arm; a line space device operated by said ratchet; and a springfor returning said ratchet to normal position.

lt. In a` typewriting machine, the combination with the carriage, of aplurality of stationary stops mounted on themain frame; a stop movablymounted on the carriage and normally in position to engage one of saidstationary stops; a carriage returning handle; vmeans whereby saidcarriage returning handle moves said movable stop into position toengage another of said stationary stops; and a carriage release devicewhich is adapted to move said movable stop out of position to engageeither of said sta tionary stops.

l5. In a typewriting machine, the combination with the carriage and theplaten, of a plurality of stationary stops; a bar movably mounted on thecarriage and having a stop mounted thereon, saidbar being normally insuch position that the stop thereon will engage one of said stationarystops; a carriage returning handle; means whereby said handle moves saidbar to a position where the stop thereon will engage another of saidstationary stops; a carriage release device which moves said bar to suchposition that the stop thereon will not enga-ge any of said stationarystops; and a line space device Which is operated by said bar when it ismoved by said handle.

1G. In a typeWritin-g machine, the combination with the carriage, theplaten and the esca-pement mechanism, ot' a member; means for movingsaid member different distances; means, operated by said member whenmoved through a certain distance, for releasing said carriage; andmeans, operated by said member When moved a greater distance, forimparting a line feed motion to said platen.

l?. In a typeivriting machine, the combination ivith the carriage, theplaten and the escapement mechanism, of a movable member; a release keyfor moving said member; means, operated by said membeil When the latteris operated by the release key, for releasing the carriage; a carriagereturning device arranged to operate said member; and a line spacedevice `operated by said member when the latter is operated by thecarriage returning device.

1S. in a type vriting machine, the combination ivith the carriage andthe platen, of a rbai' :mov-ably mounted on said carriage; a carriagestop mounted on said bar and normally in operative position; means formoving said bar and stop to a vposition -ivhere the latter isinoperative; and a line space device operated by a further movement ofsaid bar.

19. In a typeWri-ting machine, the combination with the carriage and theplaten, of a bar niovably mounted on said carriage; a carriage stopmounted on said bar and normally in operative position; a release keyfor moving said bar and stop to an inoperative position of the latter; aline space device opei'ated by a further movement of said bar; and acarriage returning device arranged to impart such further movement tosaid bar.

20. In a typeivriting machine, the combination with the carriage and theplaten, of a bar inovably mounted on said carriage; a stop mounted onsaid bar and normally standing :in operative position; a release key formoving said bar and stop to an inoperative position of the latter; aline space device operated by a further motion of saidv bar; a carriagereturning device arranged 'to impart such further motion to said bar;and a stationary stop in the path of said carriage stop when said bar ismoved by said returning device.

2l. In a typeWi-iting machine, the combination Wit-h the carriage andescapeinent mechanism, oi a member inovably mounted on said carriage; arelease key for moving said member a certain distance; a carriagereturning mechanism arranged to move said member through a greaterdistance; means' operated by said member for releasing Athe carriagewhen said member is moved by the` release key; and a trip devicearranged to render said carriage release inoperative when said member ismoved by said returning mechanism.

2Q. In a typewriting machine, the combination with the .carriage and theescapeineiit mechanism, ot a carriage release device and a carri-ageret-urniiig device; and means iv'liereby said carriage release device isrendered inoperative When the carriage returning device is operated.

23. In a Atypevvriting machine, the combination with the carriage, of anescapement Wheel; ,a loose dog normally in engagement With saidescapement Wheel; a trip for moving said loose dog out of engagementwith the escapement Wheel; a release key for operating said trip; acarriage returning device arranged to move said trip through a greaterdistance than said release key; and means for guiding said trip out ot'engagement ivi-th said dog when said trip is moved by said returningdevice.

2st. In a typeiviiting machine, the combination with the carriage, of anescapeinent mechanism including a ratchet- Wheel and a dog; -a bailmounted on the carriage and controlled by a handle; a reciprocatory barmounted on the main frame in sliding engagement with said bail; and atrip pivoted to said bar and adapted to release said escapement Wheelfrom said dog.

In a typewriting machine, the combination with the main frame, of acarriage detachab'ly mounted on said main frame; a rack bar secured tosaid carriage; and a gear Wheel journaled in the main frame and meshingvWith said rack bar and having one tooth of peculiar form to serve as aguide in placing the carriage on the machine.

26. In a typeivititing machine, the combination of a to-aiid-'ro movingcarriage; a lever fulcruined on the main frame and connected with saidcarriage to return the saine to begin new lines; aV platen; a line-spaceratchet vvheel; a line space paivl on said carriage; a movable bar oraiin on the main frame operated by said carriage-i'etuin-lcver; and abar or arm on the carriage having a sliding connection With said bar orarm on the main frame and operating said paivl to cause line feed.

'217. In a typewriting machine, the combination of a reciprocatorycarriage; a platen thereon; a line space ratchet Wheel connected withsaid platen; a line space paWl on said carriage; a movable bar or arm onsaid carriage for operating said paWl; a movable bar or arm on the mainframe and operating said carriage bar or arm; a cam for operating saidmain raine bar or arm; a carriagereturii lever on the main frame, andmeans ivhereby saidlever actua-tes said cam.

28. In a typeiviiting machine, the combination of a carriage; a platen;acam; a recessed disk alongside said cam; a slot and pin connectionbetween said cam and disk whereby the circular part of the disk may maskthe working face of the cam; a line space mechanism having an armoperated by said cam and overlapping the disk; means for returning saidcam and disk to normal positions; carriage returning mechanism; andmeans whereby the return mechanism rotates said cam to cause line feed.

29. In a typewriting machine, the combination of a carriage; a platenthereon; lever-operated toothed gearing for returning said carriage tobegin new lines; a cam independently movable on the same axis as a partof the said gearing; a recessed disk independently movable on the sameaXis; connections between said cam and disk allowing limited independentmotion of the cam; line space mechanism operated by said cam andoverlapping on said disk; means for returninw said cam and disk tonormal position; arid means for connecting said cam and return mechanismas the latter is operated to return the carriage.

30. In a typewriting machine, the combination of a carriage; a platenthereon; a line space ratchet wheel connect-ed to said platen; arotatory cam and connections for actuating said ratchet wheel; a leverconnected with said carriage to return the same to begin new lines; anda normally open clutch device for connecting said returning lever andsaid cam.

3l. In a typewriting machine, the combination of a carriage; a platenthereon; a line space ratchet connected to said platen; a pawl-carryingbar hinged to said carriage; a lever fulcrumed on the main frame andarranged to actuate said bar; a rotatory cam mounted on the main frameand operating said lever; a lever fulcrumed on the main frame andconnected with the carriage to return the same; and normallydisconnected means for connecting said return lever and said cam tooperate the latter to cause line feed.

32. In a typewriting machine, the combination of a carriage; a platenthereon; a lever fulcrumed on the main frame; connections whereby saidlever actuates said platen for line spacing; a rotatory cam; a recesseddisk alongside said cam; slot and pin connections between said cam andsaid disk whereby said cam has a limited motion independent of the disk,and then carries that disk along with it with the dwell thereof oppositethe working part of the cam; a spring for returning the cam and disk tonormal position; a toothed wheel connected with the cam; a toothedmember; and carriage return mechanism provided with means for movingsaid toothed member into and out of engagement with said toothed wheel.

33. In a typewriting machine, the combination of the platen and itscarriage, with line space mechanism mounted partly on the main frame andpartly on the carriage; 'carriage return mechanism mounted on the mainframe; and normally disconnected means for connecting said line spaceand return mechanisms during return motion of the carriage caused bysaid return mechanism.

34;. In a typewriting machine, the combination of a carriage; a platenthereon; lever operated gearing for returning said carriage to begin newlines; a rotatory cam; normally disconnected means for connecting saidreturn mechanism and said cam during the operation of the former toreturn the carriage; and a line feed mechanism operated by said cam.

35. In a typewriting machine, t-he combination of a carriage; a platenthereon; a shaft journaled on the main frame; a cam and ratchet wheelconnected together and loose on said shaft; a gear loose on said shaft;an arm fast on said shaft; a pawl carried by said gear; a lost motionconnection bet-Ween said pawl and said arm whereby said gear actuatessaid shaft through said arm, and said pawl and the cam through the pawland ratchet wheel; a line space mechanism operated by said cam; gearingconnecting said shaft and carriage to return the latter; and a leveroperated gear segment meshing with said loose gear.

36. In a typewriting machine, the combination of a cam and a toothedwheel rigidly connected together; an arm or lever having the same axisof motion as said cam and its wheel; a pawl or tooth pivotally connectedwith said arm or lever and normally disengaged from said toothed wheel;a line space mechanism operated by said cam; and carriage returnmechanism ofwhich said arm or lever forms a part and by which said pawlis moved into engagement with said toothed wheel.

37. In a typewriting machine, the combination of line space mechanism;and carriage returning mechanism normally disconnected from said linespace mechanism, with means for connecting said line space and returnmechanisms when the latter is operated to return the carriage.

38. In a typewriting machine, the combination of line space mechanismmounted partly on the carriage and partly on the main frame; carriagereturn mechanism mounted on the main frame; a letter feed escapementmechanism on the main frame; an escapement release mechanism operativelyconnected with the carriage part of the line space mechanism and meanswhereby said return and line space mechanisms are connected and thelatter operated whenever the former is operated to return the carriage.

39. In a typewriting machine, the combination of a platen and itscarriage, with line space mechanism; escapement mechanism; escapementrelease mechanism; a carriage return mechanism and a pawl and toothedwheel connection between said return and line space mechanisms; saidpawl and wheel being normally disengaged and being connected wheneverthe return mechanism is opera-ted to return the carriage.

lt). in a typewriting machine; the combination of a carriage, a bar orbail pivotally coi'xnected thereto; a platen; means whereby said bailrotates said platen: a letter space feed mechanism; means' whereby saidbail release.i :aid feed mechanism; a carriage return mechanism; a camand connections on the main frame for actuating said bail; and normallydisengaged means for connecting said return mechanism with said cam toactuate the latter when the former is used to return the carriage.

lll. in a typewriting machine, the combination of lever operated toothedgearing on the main frame for returning the carriage to .begin newlines; a bail and comiections on the carriage for causing line feed; arock shaft on the main frame provided with an arm arranged to operatesaid bail for line feed; a cam having the same axis of motion as a partof said return mechanism; an arm on said roch shaft operated by saidcam; and normally disengaged means for connecting said cam and saidreturn-mechanism whenever the latter is operated to return the carriageto begin new lines. v

4t2. in a typewriting machine, the combination with a carriage returningmechanism including a shaft, of a cam which is rotatable independentlyof said shaft; a toothed wheel connected to said cam; an arm fast onsaid shaft; a lever loose on said shaft; a pawl pivoted on said lever; alost motion connection between said arm and pawl whereby the latter isthrown into and out of engagement with said toothed wheel and the levermoves said shaft and arm; and a line space mechanism operated by saidcam.

li-. in a type vriting machine; the combination with a carriagereturning mechanism including a rotatory shaft; of a cam; a toothedwheel connected to said cam, said wheeland cam being movableindependently of said shaft; a recessed disk alongside said cam; a lostmotion connection between said cam and disk; alever overlapping saiddisk and cam and operated by the cam; a line feed mechanism operated bysaid lever; a pawl; and means for engaging said pawl with said toothedwheel when said shaft is actuated to cause return motion of thecarriage.

elet. In a typewriting machine, the combination of a carriage-supportconsistingl of a single rail having grooves facing' in oppositedirections; with a carriage connected with said grooved parts of saidrail and wholly supported by said rail; means for detachably connectingsaid rail to the main frame; letter feed mechanism geared with theunderside of said carriage; a bail pivoted on said carriage andactuating the line feed mechanism; gearing on the main frame forreversing the letter feed mechanism to return the carriage to begin newlines; a rotary cam and a rotaie-y recessed disk having the same axis ofmotion; means whereby said cam has a limited motion independent of saiddisk to mask and unmask its own working part; a bail operating leveractuated by said cam; and normally disengaged means 'for connecting saidcam and said carriage reversing mechanism whenever the latter is used toreturn the carriage to begin new lines; whereby carriages and rails ofditferent lengths may be used with one and the same main frame, carriagereversing mechanism, cam; and lever.

45. In a typewriting machine!y the combination of a carriage; a tiltablebar thereon; a margin stop on said bar; an arm on the frame providedwith a lug with which said margin stop co-acts; a lever connected withsaid bar to tilt the same to cause the stop to clear said lug; and aline space mechanism operated by the further tiltingof said bar, saidarm being arranged to co-act with said stop when the bar is tilted forline spacing.

elli. in a typewriting machine, the combi` nation of a carriage; amargin stop bar pivotally connected thereto; a stop arm en the frameprovided with a lug to coeact with the margin stop when the bar is innormal position; and bent to co-act therewith when line spacing occurs;a platen; means whereby said margin stop bar operates said platen forline spacing; a carriage returning mechanism; and mechanism connectedwith and operated by said return mechanism when the latter is used, foractuating said margin stop bar to cause line spacinO.

4i'. ln a typewriting machine, the combination of a carriage; a marginstop bar pivotally connected thereto; a stop arm on the frame providedwith a lugto co-actwith the margin stop when the bar is in normalposition; and bent to coact therewith when line spacing occurs; aplaten; means whereby said margin stop bar operates said platen for linespacing; a carriage returning mechanisin; and mechanism, connected withand operated by said return mechanism when the latter is used, foractuating said margin stop bar to cause line spacing; and a marginrelease lever connected with said margin stop bar.

48. In a t-ypewriting machine; the combination with a detent of a letterspace escapement mechanism, ot a sliding bar; a trip arm pivoted to saidbar and diseugaging llO said detent; a bail pivoted on the carriage andengaging with said sliding bar, and means for tilting said bail.

49. In a typewriting machine, the combination of a carriage; a marginstop bar pivotally connected thereto; a stop arm on the 'frame providedwith a lug to co-act with the margin stop when the bar is in normalposition, and bent to co-act. therewith when line spacing' occurs; aplaten; means whereby said margin stop bar operates said platen for linespacing; a carriage returning mechanism; and mechanism, connected withand operated by said return mechanism when the latter is used, foractuating said margin stop bar to cause line spacing, with a marginrelease lever connected with said margin stop bar; an escapement pawl;and a pawl release actuated by said margin stop bar.

50. ln a typewrit-ing machine, the combination with a carriage, a rollerplaten mounted on said carriage; and a line space wheel for said platen;of a carriage returning device mounted on the stationary framework andline space mechanism operated by said carriage returning device andcomprising` a lever which is moved always the same distance by saidcarriage returning device; a line space pawl carried by said lever; anda shield for holding said pawl out of engage ment with said line spacewheel, said shield being adjustable to cause t-he pawl to engage sooneror later with said wheel and being adjustable also to a position whereit will prevent said pawl from engaging said wheel at all, whereby theline space mechanism is rendered inoperative by said carriage returningdevice. 1

51. The combination of a carriage provided with a race part, an opposingrace part, and two sets ot rolling bearings arranged between said raceparts one in front ot the other which constitute the sole support forthe carriage, each of said race parts having a portion which bearsdownwardly on one set of bearings and upwardly on the other set ofbearings, substantially as set forth.

52. In a typewriting machine, the combination with a laterally-movablecarriage and platen, of a ball-bearing guide for the carriage comprisingtwo sets of balls arranged at one side of the platen in substantiallythe same horizontal plane, and forming the sole support for thecarriage, and a race part bearing downwardly on one set of balls andupwardly on the other set of balls, whereby the weight of the carriageretains the parts in proper adjustment, substantially as set forth.

53. In a typewriting machine, the combination with a laterally-movablecarriage and platen, of a ball-bearing guide and support comprising twosets of balls arranged in substantially the same horizontal plane inrear of the platen, the balls forming the sole support of the carriageand platen, and being adjustable for wear by the action of gravityalone, substantially as set fort-h.

54. In a typewriting machine, the combination with the carriage, ot' ahandle for returning the carriage, a stop mounted on said carriage, anda cooperating stop mounted on the main frame, one of said stops beingmoved by a positive motion of said handle into the pat-h of the other.

55. ln a. typewriting machine, the combination with the carriage, of astop mounted thereon, a cooperating stop mounted on the main frame, aplaten, a handle, and connections whereby said handle imparts a linespace feed to said platen and moves one of said stops into the path ofthe other.

Signed at Syracuse, in the county of Onondaga and State of New York,this 27th day of June A. D. 1904 ALEXANDER T. BROVN.

l/Vitnesses Y E. E. Coni', A. L. HINMAN.

